Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '081a2fc03f3bd9664c1f582bcae6dee61c34979bd957108090607d3acea69116' 
  AND token = 'oKe3PrYMwu1+mapOd/1ONL13LmJypBzToXfa8y5LqHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}